Carbureter.



C, Wi HARTSHORN.

CAHBUHETEH.

APPLICATION man ma. is. 10:5

2 SHEETS-SHEET l.

lV/TNESSES C. W. HARTSHQHN.

CARBURETER.

APPLICATION man mmf la, wie.

2 SHEETS-SHEET 2.

` tisanes.,

GARBURETER.

To all whom t may concern:

fuel,

plan'view of thek same, partl Fig. 3 is a side elevation o ,A Be it known that' l, CHESTER W. HAR'rs- HoRN, a citizen of the United States, residing at Ford, in the county of Ford and State of Kansas,- have invented a certain new and useful Improvement in"l Carbureters, of which the following is a specification.

My invention relatesto improvements in carbureters. f l l l .i

One of the objects of my invention is to provide al carbureterwith'l novel means for obtaining athorough mixture kof air and `which will have a maximum -of ehciency, which is'vsimple inconstruction and not liable to gety out` of order, and kin which the parts maybe quickly assembled and disassembleda A further object of my 'invention is to provide novel meansy for heating the charges; Still another' object of my invention is to provide novel'means bywhich the relative proportions yof* a'irj and fuel may be varied whilel the engine is running.

Other novel featuresrof luy-invention are hereinafter fully described and claimed.

In the `"accompanyingdrawingsf which illustrate the preferred embodiment, of my invention, 'Figure ,1 is a central vertical sectional view of my carbureter. Fig. 2 is a broken away. a part of the device, showingthe operating lever and Some of the parts connected thereto. Fig. 4 is ahorizontal section on` theline 4 4 of Fig. 1. Fig.l 5 is aside elevation of the upperpartf of my improved carbureter. Fig. 6 is a horizontal` sectional view, partly broken away "and enlarged, showing the butterfly valve and connected parts in the closed position. Fig. 7 is an enlarged sectional viewon the line 7 7 vof Fig. 5. Fig. 8 is a horizontal section on the line 8-'-8 of Fig. l.

Similar reference characters designate similar parts in the diiferent views.

rl`he carbureter casing comprises, preferably an upper part 1, and a lower part 2 connected by a vertical bolt v3 with the upper part, an annular heating chamber 4 being held clamped between said upperand lower' parts.

Fuel, such as gasolene, is supplied from a suitable source of supply by a pifpe 5 which communicates with an inlet 6 o a settling chamber 7 in the upper part of the casing. The part l is provided with a screw thread- Vfloat 22 rises specification of Letters Patent. Patented 5.9m, 12, 1pm, Application mea March is, 1915. serial No. 14,847.

ed hole communicating with the chamber 7 and having removably fitted therein a screw plug 8 having in its lower end a recess 9 communicates with lateral holes 10 ed plug 17, andthe upper end of which is 'provided with -a discharge hole 18 adapted tw plug 8, the periphery of which is to be closed by. a valve 19 having a stem' which extends above and below said hole 18. A coil spring 20 encircling the lower part of said stem, bears atits upper end against a transverse pin 21 in said stem, and at its lower end the spring bears upon the plug 17. The spring 20 normally forces the valve 19 to the closed position.

An 'annular float 22 encircles the projection 13 and carries a vertically adjustable screw valve 23 which is slidably mounted in a. cap 24 secured t0 the lower end of the projection 13, the lower end of which is provided with a valve seat 25 inwhich is adapted to be seated the valve 23 when the to a predetermined position. Fuel passing through the inlet 6 enters the lsettling chamber 7 and passes upwardly therefrom through a screen 26 which eX- tends across the 'chamber above the inlet 6.

The fuel passes through the recess 9, holes 10, groove 11, passage 12, and seat 25 into the cap 24, from which the fuel passes by openings 27 in the cap into the central opening of the float 22, passing from thence into the float chamber by the outlet 15 into the fuel ipe 16. When the valve 19 is open the fuel) passes out of the fuel pipe 16, by the discharge opening or hole 18, into an air tube 28 which is concentric with and spaced apart from the fuel pipe 16, and which has a. lower open end communicating with the atmosphere through au air inlet 29 provided in the lower part of the part 2 of the casing.

The upper end of the'air tube 28 is provided with a central air inlet, preferably comprisin centrally t irough the central openingof the 14 from which it passes heating chamber 4 and through a mixing chamber 31, provided in the upper part`1 of V the casing, and having its upper end cornmunicating with the atmosphere.

The central opening, designated 32', of f w 30 is normally held by a coil spring 35 in a position closing the opening 32 and inlet 33.

For varying the pressure of the spring 35 upon the valve 34, there is slicl'ably' mounted on the tube 3() a. plate 36 having a vertical screw-tlireaded hole in which 1s rotatably fitted a screw 37, which extends through and is rotatably mounted in a vertical hole provided in the upper part 1 of the casing. A collar 38 secured to the screw 2@ 37 within the mixing chamber 31 is adapted to contact with the casing to limit the vertical movement upwardly of the screw 37, the head of which bears against a spring washer 37 which rests upon the top of the casing 1. By turning the screw 37, the plate 36 may be vertically adjusted to change the pressure of the spring on the valve 34. a

A series of discharge tubes 39 have their lower ends connected to the air tube 28 cona0 centrically with respect to the tube 30 and fuel pipe 16, the inlet ends of said discharge tubes being disposed adjacent to the lower end of the tube 30 and the upper end of the pipe 16. The discharge tubes39 extendupa5: vwardly through the annular heating cham* ber 4 and have their upper ends disposed concentrically around and adjacent to the inlet 33 and valve 34 and discharging into the mixing chamber 31.

gThe mixing chamber 31 is provided with an outlet 40 which is adapted to be connected to the cylinder of an explosivev engine and through which the mixed a1r and fuel vapor passes to the engine. The passage of fluid through the outlet 40 is controlled by means of a butterfly valve 41, which is rigidly secured to a horizontal rock shaft 42 which extends through the side walls of the casing part 1 and which has secured to it, Fig. 3, a lever 43 which s'erves as an operating lever and which has connected to it, Fig. 5, a rod 44, by means of which the lever may be swung. Then the butterfly valve 41 is swung to the open position and the engine is started, a partial vacuum will be produced in the mixing chamber 31, thereby effecting a suction in the discharge tubes 39 and in the air tube 28. If now the valve 19 be opened, the liquid fuel would 60 be drawn from the fuel pipe 16 through the discharge hole 18 and into the air tube 28, At the same time air will be drawn upwardly through the inlet 29i and downwardly through the tube 30 into the airl tube 65 28. As the discharge opening 18 isjadjamixture will'pass into the mixing chamber 31,`from which itwill escape past the valve 4l through the outlet 40 lto the engine, not shown. As the discharge. tubes 39 extend through the heating chamber 4, these tubes will-be heated, thereby heating the explosive `mixture passing through said tubes.

Any suitable means may be employed for heating the chamber 4, as by the exhaust from an explosive engine passing into the chamber 4 by means of an exhaust pipe 45, Fig. 5.

For depressing andthereby opening the fuel valve 19 synchronously with the opening of the butterfly valve 41, the following described mechanism is provided: Referring particularly to Figs. 5, 6 and 7, 46 designates a crank which is secured to the rock shaft 42 and which is provided with a lug 47 to which is pivoted by a transverse pin 48 an arcuate member comprising preferably an annulus 49 upon the periphery of which is adapted to bear a member 50 which is pivoted to a horizontal rock shaft 51 which i-s oscillatably mounted in a bearing 52 provided on the upper side of the upper part 1 of the casing. Secured rigidly to the rock shaft 5l is a crank 53 provided with a transverse hole which is screw-threaded and has fitted therein an adjusting screw 54, which is adapted to bear against the member 50, as shown in Figs. 1, 2 and 5. Rigidly secured to the rock shaft 51 is a crank 55 which has itsvouter `end mounted in a transverse slot 56 provided in the upper part of the stem of the valve 19, Figs. 1 and 7. By-

adjusting the screw 54, the crank 53 'and arm 50 may be swung so as to vertically adjust the outer end of the` member 50 to compensate for wear of the valve 19 in its seat and for the wear on the periphery ofthe member 49 or lower side of the member 50. By adjusting the screw 54, the valve 19 may be normally retained slightly open for cranking and slow speed purposes. The arcuate member 49, the function of which is to lift the member 50 so as to depress and open the valve 19, is preferably adjustable to different degrees of eccentricity with respect to the rock shaft 42, which it encircles. The distances from the centei of the rock shaft 42 and from the center of the arcuate member 49 to the center of the pin 48 are substantially the same, so that it is possible to swing the member 49 to a position in which the center of the member 49 and that of the shaft 42 will coincide, at which time there would be no eccentricity of the periphery of the member 49, and the swinging of the lever 43 would not cause any lifting of the member 50. To obtain, therefore, the desired lift of the member 50 for depressing and opening the valve 19, the amount required to secure the desired mixture of fuel and air, means are provided for swinging the member 49 toward and from the neutral position. To effect this, the crank 46 is'provided 1o with a. screw-threaded hole in which is fitted an adjusting screw 57, Fig. 5, which is disposed radially to the shaft 42, and which bears at its inner end against the periphery of the member 49 below the pivot pin 48. By

16 adjusting the screw 57 inwardly, said screw will swing the member 49 so as to increase its eccentricity with respect to the rock shaft 42. A spring 58 secured to the crank 46 and bearing against the head of the screw 20 57 releasably retains said screw in' the position to which it is adjusted. A coil spring 59 having its ends secured respectively to lugs 60 and 61 which are provided respectively on the crank 46 and member 49, normally holds the latter member against the inner end of the screw 57.

The lower end ofthe fioat chamber 14 is provided With a screw-threaded hole 62,

which is in alinement with the valve 23 and 3o which has removably fitted in it a shut-off cock 63.

In the operation of my invention, the operating lever 43 is swung from the closed position, in which a projection 64 on the lever 43 is in contact with a lug 65 on the upper part 1 of the casing, Figs. 2 and 3, and in which the crank 46 and screw 57 are in the position shown in Fig. 6, thereby rocking the shaft 42 so as to swing the i0 arcuate member 49, thereby lifting the member 50 and opening the valve 19 by the,V

mechanism already described. If the engine is now cranked so as to create a suction `in the mixing chamber3l, fuelwill be drawn l5 from the fuel pipe 16 into the air tube 28, there mixed with air entering said tube through the tube 30 and inlet'29 and then discharged through the tubes 39 into the mixing chamber 31. As the-speed' of the 0 engine increases, and the richness ofthe mixture in the chamber 31 requires to be reduced by an increased supply of.air,'the valve 34 will be lifted against the pressure of the spring 35 and air will be drawn into 5 the mixing chamber 31 through' the opening 32 and inlet 33, which are in communication with an air inlet 66 which communicates with the atnosphere and which encircles ythe air tube 28, see Fig. 1. rlhe air thus drawn through theopening 32 will be heated by the heating chamber 4 as is the mixture which passes through the tubes 39. l By having the tubes 39 disposed with their discharge ends adjacent to and concentric with the inlet 33, a thorough mixture of the air passing through the opening 32 and with the mixed air and va or passing through the tubes 39 will be eected. By reason of the mechanism connecting the buttery valve 41 and the fuel valve 19, the 7@ latter will be opened an amount proportionate to the opening of the valve 41'. The opening movement of the latterl may be limited by means of an adjusting screw 67 which is mounted in the lever 43 and is 75 adapted to strike against the lug 65, Figs. 2 and 3. By adjusting the screw 37 so as to vary the pressure of the spring 35, the de gree of suction required to lift the valve 'i 34 may be varied to suit the atmospheric 30 conditions and thel quality of liquid fuel employed.

As the liquid fuel enters the float chamber 14, the valve 19 being closed, the liquid will rise in the float chamber, thus'lifting 85 the fioat 22 until the valve 23 closes the lowerfend of the passage 12, at which time, if the valve 23 is in the proper adjustment, the level of the liquid in the float chamber will be slightly below the top of the fuelv pipe 16, as, for example, at about the plane of the line en -b in Fig. 1. By adjusting the screw 23, the rise of the ioat 22 may be adjustably` limited, thus permitting a variation in the level of the liquid in the float cham 95 ber 14. p By. removi g the plug 8 and screen 26,- the sediment kwhich collects in the settlin chamber 7 may be accessible for its removalgv I do not limit fmy invention to the structure shown and described, as modifications, within the scope of the appended claims, may be made without departing from the spirit of my invention. What ll claim is:- Y 105 1. In a carbureter, a mixing chamber, an y air tube having an air inlet, a series of discharge tubes connected to said air tube concentrically with and adjacent to said inlet j and discharging into said mixing chamber, and a ,fuel pipe discharging into said air tube adjacent to and in alinement with and ina direction opposite to the passage of air from said inlet and adjacent to the inlet ends .of said discharge tubes.` Y

v 2. In carbureter, a mixing chamber having an air inlet, an air tube having an air inlet, a series of discharge tubes connected to said air tube concentrically kwith and adjacent to the air inlet of said air tube and discharging into said mixing chamber concentrically with and adjacent to said air .inlet of said mixing chamber, and a fuel pipe discharging into ysaid vair tube adjacent to and in alinement with and in a direction opposite to the passage of air from the air inlet of said, air tube and adjacent to the inlet ends of said discharge tubes.

3. In a carbureter, a mixing chamber having an air inlet, an airtube having an air 13o inlet, a series of discharge tubes connected to said air tube concentrically with and ad- YY.jacent to the air inlet of said air tube and discharging into said mixing chamber concentrically -with and adjacent to said air inlet of the mixing chamber, a fuel pipe discharging into said air tube adjacent to and in alinement with the airinlet of said air tube and adjacent to the inlet ends of said discharge tubes, and an annularheat-l. ing chamber through Which said discharge tubes extend and the central` opening of which communicates with the atmosphere and with the air inlet of said mixing cham'- ber.

4. In a carbureter, a mixing chamber hav- Qing an air inlet, an air tube having an air inlet, "a series of discharge tubes connected l5to said air tube concentrically with and adjacent to the air inlet of' said air tube and discharging into the mixing chamber concentrically vWith and adjacent to said air inlet of the mixing-chamber, a fuel pipe discharging into said air tube adjacent to and Qin, alinement with and in a direction oppcsite to the passage of air from the air "-.inlela of said air tube and adjacent to the u nds of `said .discharge tubes, and an f'` {finvvax} ly opening normally closed valve controll-ing theair inlet of the mixing chamber. 5. In a carbureter, a mixing chamber, an

j airptube''having an air inlet, a series of disv charge tubes connected to said air tube concentrically with and adjacent to said inlet and discharging into the mixing chamber, a fuel pipe discharging into said air tube adjacent to and in alinement with said air inlet and adjacent to the inlet ends of said discharge tubes, an annular heating chamber through which said discharge tubes extend and having a central opening communicating'with the atmosphere and With said mixing chamber, and an inwardly opening` valve normally closing said central opening.

6. In a carbureter, a mixing chamber, an air tube having one end communicating with the atmosphere, a series. of discharge tubes connected concentrically with said air tube anddischarging into said mixing chamber, a fuel pipe disposed concentrically in said air. tube and spaced apart therefrom and discharging therein adjacent to the inlet ends of said discharge tubes, andan annular heating chamber through which the discharge tubes extend and provided with a ends of said discharge tubes, an annular heating chamber through which said discharge tubes extend and provided with a central opening communicating with the atmosphere and with said mixing chamber, and an inwardly opening valve normally closing said central opening.

8. In a carbureter, a mixing chamber, an air tube having one end communicating with the atmosphere and provided at the other end with an air inlet,` a.l series of discharge tubes connected to said air tube concentrically with and adjacent to said inlet and dis-` charging into the mixing chamber, and a fuel pipe disposed concentrically in said air tube and spaced apart therefrom and discharging therein adjacent to and in alinement with said air inlet -and adjacent: to the inlet ends of said discharge tubes.

9. In a carbureter, a mixing chamber having an air inlet, an air tube havin one end communicatin withv the atmospere' and having an air inlet at its other end,`a series of discharge tubes connected to said air tube concentrically'with and adjacent to the air inlet of said air tube and discharging into said mixing chamber adjacent to the air inlet thereof, and a fuel pipe disposed concentrically in said air tube and spaced apart therefrom and discharging therein adjacent to and in alinement Withthe air inlet of said air tube and adjacent to the inlet ends of said discharge tubes. i

10. In a carbureter, a mixing chamber havingan air inlet, an air tube having one end communicating with the atmosphere and having an air inlet at the other end, a series of discharge tubes connected to said air tube concentrically with and adjacent to the air 4inlet vof said air tube and discharging into the mixing chamber, a fuelpipe disposed concentrically in said air tube and spaced apart therefrom and discharging therein adjacent to and in alinement with the air inlet of said air tube and adjacent to the inlet ends of said discharge tubes, and an in- Wardly opening'valve normally closing the air inlet of said mixing chamber.

11. In a carbureter, a mixing chamber, an air tube having one end communicating with the atmosphere and having an air inlet at the other end, a series of discharge tubes connected to said air tube concentrically with and adjacent to said air inlet and discharging into the mixing chamber, a fuel pipe disposed concentrically in and spaced apart from said air tube and discharging therein adjacent to and in alinement with .said air inlet and adjacent to the inlet ends of said discharge tubes, and an :annular heating chamber through which said ldischarge tubes extend and having a central opening communicating with the atmosphere and with said mixing chamber.

12. In a carbureter, a mixingl chamber,

an air tube having one end communicating with the atmosphere and having an air inlet at the other end, a series of discharge tubes connected to said air tube concentrically with and adjacent to said air inlet and discharging into said mixing chamber, a fuel pipe disposed concentrically in and spaced apart from said air tube and discharging therein adjacent to and in alinement with said air inlet and adjacent to the inlet ends of said discharge tubes, an annular heating chamber through which said discharge tubes extend and having a central opening communicating with the atmosphere and with said mixing chamber, and an inwardly opening valve normally closing said central opening.

13. In a carbureter, a mixing chamber having an outlet, a fuel valve, a rock shaft, a valve carried by said rock shaft and controlling said outlet a member carried by said rock shaft and adjustable thereonto different positions, a second rock shaft having a crank, an adjusting screw mounted in said crank, a member pivoted to said second rock shaft and adapted to bear against said screw, and to be actuated by said adjustable member, and means operated by said second rock shaft for actuating said fuel valve.

14. In a carbureter, a mixing chamber having an outlet, a fuel valve, a rockshaft, a valve carried by said rock shaft and controlling said outlet, an arcuate member pivoted to said rock shaft, means for adjusting said arcuate member to different degrees of eccentricity relatively to said rock shaft, a second rock shaft having a crank, an adjusting screw carried byL said crank, means operated by said second rock shaft for actuating said fuel valve, and a member pivoted to the second rock shaft and adapted to bear against said screw and upon said arcuate member.

In testimony whereof I have signed my name to this speciication in presence of two subscribing witnesses.

CHESTER W. IIAR'ISHORN.

Witnesses:

IRA PAULIN,

L. HARTSHORN.A 

